The loss of a loved one in our life is usually sad and often tragic, and it would be perverse to suggest otherwise. While most bereaved people are sad for a period of time, very few become chronically depressed.
Psychologists state that more than half of the people in the United States will experience a trauma during their lifetime (physical assault, natural disaster), but only a small fraction will develop any post-traumatic pathology or require professional assistance. In fact, resilience is usually the most observed outcome trajectory following exposure to a potentially traumatic event. Like the Kool Aid Juice Man, it would appear that we, too, can put those defensive resiliency walls right back up.